Very nice small apartment in a condo building. There's a pool (excellent for swimmers, as it is approx 30 m long), a laundry room, communal library etc. There's also a private washing maschine in the apartment. TV has netflix and smart-TV so you can watch (a lot of rooms in Bangkok only have "TV" - which means thai, chinese and japanese TV channels).
The condo is directly at the BTS On Nut station. It's about 20min to the most touristy area - which we found extremely nice. That way, we enjoyed local food stalls, local shops and non-touristic food and prices. Thais love to eat outside was our impression and the local open restaurant (3min from the apartment) has all sorts of different food and is really nice to be at in the evening.
Compared with all other condos/apartments we've had in Bangkok, Luesak's apartment was the cleanest.
He even brought us a second duvet (and brought some snacks for my boy) . You should ask upfront to get a second one, otherwise you will only get 1 large duvet for 2 persons.